Patent · US Active

Piston ring for internal combustion engines

US10000840B2 · kind B2 · utility

0Cited by

13References

13Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Manfred Fischer · Leichlingen, DE
Ralf Lammers · Wermelskirchen, DE
Christiane Bauer · Burscheid, DE
Steffen Hoppe · Overath, DE

Key dates

Filing date	Oct 1, 2007
Grant date	Jun 19, 2018
Priority date	—
Expiry date	Sep 7, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16J9/26
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a piston ring which is produced from a carrier material, especially steel or a cast material. The piston ring has a wear-resistant coating from a periodic multilayer system, every periodicity consisting of at least two individual metal nitride layers. The multilayer system has superlattice structures, the thickness of an individual layer being ≥2 nm to <15 nm and the thickness of the multilayer system being >4.5 μm and adjacent individual layers within the periodicity having different metallic elements.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.